Thanks for the quick response and for pointing me to the kobo touch plugin. Using the proposed template calibre still sends the same book to "boks" instead of books
I have mapped calibre series column to kobo's collection, so my ideal structure would be like ebooks/bookcategorie/author-title. This way I could use both the standard reader as well as koboreader.
The best I can do right now is use ebooks/{series}/{title} as template. Both readers will show the metadata including title & author.
I use Calibre 9.9 on Linux
Mark